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Mybatis 時間排序讓空值NULL排在後面

有一張通知(notification)表;

需求:

1.狀態(status)為釋出“on”要排在未釋出“off”前面;

2.先按釋出時間排序再按建立時間排序,釋出時間為空的要排在後面。

select * from notification;
id content status create_time publiish_time
1 aaa on 2018-10-17 12:45:00 2018-10-17 12:45:00
2 bbb off 2018-10-17 12:45:00  
3 ccc on 2018-10-17 12:45:00 2018-10-17 12:45:00
4 ddd on 2018-10-17 12:45:00 2018-10-17 12:45:00
5 eee off 2018-10-17 12:45:00  

 

 

 

 

 

 

 

<select id="getResultList" parameterType="com.hekliu.NotificationQry" resultMap="BaseResultMap">
        SELECT
        <include refid="Base_Column_List"/>
        FROM notification
        WHERE
        1 = 1
        <if test="content != null and content !=''">
            AND content = #{content}
        </if>
        <if test="status != null and status != ''">
            AND status = #{status}
        </if>
        <if test="startPublishDate != null and startPublishDate != ''">
            AND  <![CDATA[DATE_FORMAT(publish_time,'%Y-%m-%d %H:%i:%s') >= #{startPublishDate}]]>
        </if>
        <if test="endPublishDate != null and endPublishDate != ''">
            AND <![CDATA[DATE_FORMAT(publish_time,'%Y-%m-%d %H:%i:%s') <= #{endPublishDate}]]>
        </if>
        ORDER BY
        status = "off", status = "on", create_time DESC, publish_time is NULL, publish_time DESC
    </select>

原文連結:https://blog.csdn.net/liu59412/article/details/83141566